Elevated levels of interleukin‐13 and IL‐18 in patients with dengue hemorrhagic fever
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TLDR
The presence of high levels of IL-13 and IL-18 during severe illness and late phases of the disease suggests that both of these cytokines may contribute to the shift from a Th1- to Th2-type response and thus to the pathogenesis of DHF.Abstract:
Interleukin (IL)-13 is produced by T helper 2 (Th2)-type cells and inhibits the production of proinflammatory cytokines by activated monocytes, while IL-18 is a pleiotropic cytokine that induces interferon-γ and plays an important role in the development of Th1-type cells. Role of the shift from a Th1-type response to Th2-type has been suggested in the pathogenesis of dengue hemorrhagic fever (DHF). This study was undertaken to investigate the possible protective/pathogenic role of IL-13 and IL-18 in patients with DHF. Sera were collected from a total of 84 patients with various grades of dengue illness and 21 normal healthy controls and tested for IL-13 and IL-18 levels using commercial enzyme-linked immunosorbent assay kits. The results showed that very low levels of IL-13 (4±3 pg ml−1) and IL-18 (15±4 pg ml−1) were detected in the sera of healthy controls. In dengue patients, the levels of IL-13 and IL-18 were the highest in the patients with DHF grade IV (205±103 pg ml−1 and 366±155 pg ml−1, respectively) and the lowest in patients with dengue fever (22±12 pg ml−1 and 76±50 pg ml−1, respectively). Both the cytokines appeared (IL-13=20±11 pg ml−1 and IL-18=70±45 pg ml−1) during the first 4 days of illness and reached peak levels (IL-13=204±96 pg ml−1 and IL-18=360±148 pg ml−1) by day 9 onwards. The presence of high levels of IL-13 and IL-18 during severe illness and late phases of the disease suggests that both of these cytokines may contribute to the shift from a Th1- to Th2-type response and thus to the pathogenesis of DHF.read more
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Journal Article
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IL-18 is a potent coinducer of IL-13 in NK and T cells: a new potential role for IL-18 in modulating the immune response.
TL;DR: IL-13 expression induced by IL-2 + IL-18 may be regulated by IFN-gamma in vivo, while IL-10 expression may be IFN -gamma-independent, according to the cell type.
Journal ArticleDOI
Cytokine cascade in dengue hemorrhagic fever : implications for pathogenesis
TL;DR: A cascade of cytokines, that in this paper's view, may lead to DHF, are presented, including a unique cytokine, human cytotoxic factor (hCF), that initiates a series of events leading to a shift from Th1-type response in mild illness to a Th2- type response resulting in severe DHF.